Initial Performance Tests

Create a Performance folder for unit tests focused on measuring
performance numbers.  Initial test is measuring FileCache.Add and
FileCache.Find.
Merge pull request #5 from BruTile/master

Merge updates from origin
Merge pull request #6 from josh-cooley/master

Merge updates from origin
Correct VS Version to match master
Merge pull request #17 from josh-cooley/PerformanceTests-in-solution

Performance tests in solution